Add option to start on a specific day of the week

2 files changed, 40 insertions, 5 deletions

diff --git a/mmenu.1.scd b/mmenu.1.scd
index d7abf1b..1cdbc6d 100644
--- a/mmenu.1.scd
+++ b/mmenu.1.scd
@@ -6,9 +6,12 @@ mmenu - view the Castle menu
 # SYNOPSIS
 *mmenu*
 
+*mmenu* [day of the week]
+
 # DESCRIPTION
-The *mmenu* utility uses Nobilis in order to display the castle menu. There is
-no real command line interface, and the GUI is programmed in Motif.
+*mmenu* uses Nobilis in order to display the castle menu. There isn't much of a
+command line interface, however, you can optionally specify the day of the
+week to open on. The GUI is programmed in Motif.
 
 # EXIT CODES
 *0*    all ok,++
diff --git a/mmenu.c b/mmenu.c
index 8691b45..d14f4a3 100644
--- a/mmenu.c
+++ b/mmenu.c
@@ -1,6 +1,8 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdbool.h>
+#include <string.h>
+#include <ctype.h>
 
 #include <Xm/Xm.h>
 #include <Xm/Text.h>
@@ -153,11 +155,41 @@ ArgvToXmStringTable (int argc, char **argv)
 	return new;
 }
 
+char *
+strLower(char *inp)
+{
+	char *tmp = calloc(strlen(inp), sizeof(char));
+	strcpy(tmp, inp);
+	for (int i = 0; tmp[i]; i++){
+		tmp[i] = tolower(tmp[i]);
+	}
+	return tmp;
+}
+
 int
 main(int argc, char *argv[])
 {
-	if (argc > 1) {
-		printf("Usage: %s\n", argv[0]);
+	// Parse CLI arguments
+	bool showUsage = false;
+	if (argc == 2) {
+		showUsage = true;
+		char *arg = strLower(argv[1]);
+
+		for (int i = 0; i < 5; i++) {
+			char *day = strLower(days[i]);
+
+			if (strcmp(day, arg) == 0) {
+				showUsage = false;
+				break;
+			}
+
+			free(day);
+		}
+		free(arg);
+	}
+
+	if (argc > 2 || showUsage) {
+		printf("Usage: %s [optional: day of the week]\n", argv[0]);
 		exit(3);
 	}
 
@@ -178,7 +210,7 @@ main(int argc, char *argv[])
 
 	// Create text widget to display menu
 	n = 0;
-	char *nl = getmenu("");
+	char *nl = getmenu((argv[1]) ? argv[1] : "");
 	XtSetArg(args[n], XmNvalue, nl); n++;
 	XtSetArg(args[n], XmNeditable, False); n++;
 	XtSetArg(args[n], XmNcolumns, 80); n++;